Column-footing.



WILLIAM I. ANDERSON, OF CINCINNATI, OI-IIO, ASSIG-NOR TO THE FERROCONCRETE CONSTRUCTION COMPANY, OF CINCINNATI, 01-110, A CORPORATION OFOHIO.

COLU1VINFOOTING.

Application filed September 28, 1911.

To all whom it may concern Be it known that I, WILLIAM P. ANDER- SON, acitizen of the United States of America, and resident of Cincinnati,county of Hamilton, and State of Ohio, have invented certain new anduseful Improvements in Column-Footings, of which the fo1- lowing is aspecification.

The object of my invention is a columnfooting, in which thereinforcement in each part is in direct proportion to the strain towhich that part is subjected, and may be assembled readily. This objectis attained by the means described in the specification, and illustratedin the accompanying drawings, in which:

Figure 1 is a plan view, showing the arrangement of the reinforcingmembers of a columnfooting, embodying my invention. Fig. 2 is a centralsectional view of the column-footing and the lower end of the column.

The reinforcing members of the columnfooting embodying my inventionconsist of a series of concentric rings, A, A A A to which may be addeda series of radial rods B. Ring A is of less diameter than thesuperposed column D, and ring A is of somewhat greater diameter thansaid column. R-ods B may have at their inner ends hooks b. I-Iooks I)embrace rings A, A. Concrete embeds the reinforcing members, and extendsfrom the periphery e of the footing in a tapering or conical form to thecolumn D.

The greatest strains upon the columnfooting are those occurring directlybeneath Specification of Letters Patent.

Patented Apr. 27, 1915.

Serial No. 651,710.

the periphery of the column. By the construction of the rings and rods,the reinforcing members are doubled beneath this part of the column, byreason of the hooks b in the rods. The strainsupon the columnfootingdecrease toward its periphery.

It will be noted that with my construction, since the hooked rodsradiate or diverge from the center outward, that the amount ofreinforcement diminishes in direct proportion to the distance of thepoint from the center of the column, and since the strain in thecolumn-footing diminishes in proportion to the distance of any part fromthe center of the column, that the reinforcement diminishes in likemanner.

What I claim is A column footing comprising reinforcing membersconsisting of three or more concentric rings located adjacent to thebottom of the footing, the inner ring of which is of a diameter smallerthan that of the column and the next ring of which is of a diametergreater than that of the column, radiating rods hooked at their ends,the hooked portions embracing the two or more inner rings with the lowerlegs of the hooked portions crossing beneath the outer rings, the hookof each rod lying in the vertical plane of the rod and concretesurrounding and embedding the rings and the rods.

WILLIAM P. ANDERSON. Witnesses:

WALTER F. MURRAY, W. THORNTON Boonnr.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G,

